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/*
* Copyright (c) 2006-2023, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2021-08-10 charlown first version
*/
#include <rtthread.h>
#include <rtdevice.h>
#include "board.h"
#include "drv_uart.h"
#include "ch32f10x_usart.h"
#include "ch32f10x_misc.h"
#ifdef BSP_USING_UART
#ifndef ITEM_NUM
#define ITEM_NUM(items) sizeof(items) / sizeof(items[0])
#endif
struct usart_device
{
struct rt_serial_device parent;
char *name;
USART_TypeDef *periph;
IRQn_Type irqn;
};
#ifdef BSP_USING_UART1
static struct usart_device usart_device1 =
{
.name = "uart1",
.periph = USART1,
.irqn = USART1_IRQn,
};
#endif
#ifdef BSP_USING_UART2
static struct usart_device usart_device2 =
{
.name = "uart2",
.periph = USART2,
.irqn = USART2_IRQn,
};
#endif
#ifdef BSP_USING_UART3
static struct usart_device usart_device3 =
{
.name = "uart3",
.periph = USART3,
.irqn = USART3_IRQn,
};
#endif
static rt_err_t ch32f1_usart_configure(struct rt_serial_device *serial, struct serial_configure *cfg)
{
struct usart_device *usart_dev;
USART_InitTypeDef USART_InitStructure;
RT_ASSERT(serial != RT_NULL);
RT_ASSERT(cfg != RT_NULL);
usart_dev = (struct usart_device *)serial;
RT_ASSERT(usart_dev != RT_NULL);
ch32f1_usart_clock_and_io_init(usart_dev->periph);
USART_StructInit(&USART_InitStructure);
USART_InitStructure.USART_BaudRate = cfg->baud_rate;
USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
switch (cfg->data_bits)
{
case DATA_BITS_8:
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
break;
case DATA_BITS_9:
USART_InitStructure.USART_WordLength = USART_WordLength_9b;
break;
default:
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
break;
}
switch (cfg->stop_bits)
{
case STOP_BITS_1:
USART_InitStructure.USART_StopBits = USART_StopBits_1;
break;
case STOP_BITS_2:
USART_InitStructure.USART_StopBits = USART_StopBits_2;
break;
default:
USART_InitStructure.USART_StopBits = USART_StopBits_1;
break;
}
switch (cfg->parity)
{
case PARITY_NONE:
USART_InitStructure.USART_Parity = USART_Parity_No;
break;
case PARITY_ODD:
USART_InitStructure.USART_Parity = USART_Parity_Odd;
break;
case PARITY_EVEN:
USART_InitStructure.USART_Parity = USART_Parity_Even;
break;
default:
USART_InitStructure.USART_Parity = USART_Parity_No;
break;
}
USART_Init(usart_dev->periph, &USART_InitStructure);
USART_Cmd(usart_dev->periph, ENABLE);
return RT_EOK;
}
static rt_err_t ch32f1_usart_control(struct rt_serial_device *serial, int cmd, void *arg)
{
struct usart_device *usart_dev;
NVIC_InitTypeDef NVIC_InitStruct;
RT_ASSERT(serial != RT_NULL);
usart_dev = (struct usart_device *)serial;
RT_ASSERT(usart_dev != RT_NULL);
NVIC_InitStruct.NVIC_IRQChannel = usart_dev->irqn;
NVIC_InitStruct.NVIC_IRQChannelPreemptionPriority = 2;
NVIC_InitStruct.NVIC_IRQChannelSubPriority = 1;
switch (cmd)
{
case RT_DEVICE_CTRL_CLR_INT:
NVIC_InitStruct.NVIC_IRQChannelCmd = DISABLE;
NVIC_Init(&NVIC_InitStruct);
USART_ITConfig(usart_dev->periph, USART_IT_RXNE, DISABLE);
break;
case RT_DEVICE_CTRL_SET_INT:
NVIC_InitStruct.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStruct);
USART_ITConfig(usart_dev->periph, USART_IT_RXNE, ENABLE);
break;
}
return RT_EOK;
}
static int ch32f1_usart_putc(struct rt_serial_device *serial, char ch)
{
struct usart_device *usart_dev;
RT_ASSERT(serial != RT_NULL);
usart_dev = (struct usart_device *)serial;
RT_ASSERT(usart_dev != RT_NULL);
USART_SendData(usart_dev->periph, (uint8_t)ch);
while (USART_GetFlagStatus(usart_dev->periph, USART_FLAG_TXE) == RESET)
;
return 1;
}
static int ch32f1_usart_getc(struct rt_serial_device *serial)
{
struct usart_device *usart_dev;
int ch;
RT_ASSERT(serial != RT_NULL);
usart_dev = (struct usart_device *)serial;
RT_ASSERT(usart_dev != RT_NULL);
ch = -1;
if (RESET != USART_GetFlagStatus(usart_dev->periph, USART_FLAG_RXNE))
{
ch = USART_ReceiveData(usart_dev->periph) & 0xff;
}
return ch;
}
static const struct rt_uart_ops usart_ops = {
.configure = ch32f1_usart_configure,
.control = ch32f1_usart_control,
.putc = ch32f1_usart_putc,
.getc = ch32f1_usart_getc,
.dma_transmit = RT_NULL};
static void usart_isr(struct usart_device *usart_dev)
{
RT_ASSERT(usart_dev != RT_NULL);
if ((USART_GetITStatus(usart_dev->periph, USART_IT_RXNE) != RESET) && (RESET != USART_GetFlagStatus(usart_dev->periph, USART_FLAG_RXNE)))
{
rt_hw_serial_isr(&usart_dev->parent, RT_SERIAL_EVENT_RX_IND);
USART_ClearITPendingBit(usart_dev->periph, USART_IT_RXNE);
USART_ClearFlag(usart_dev->periph, USART_FLAG_RXNE);
}
else
{
if (USART_GetFlagStatus(usart_dev->periph, USART_FLAG_CTS) != RESET)
{
USART_ClearFlag(usart_dev->periph, USART_FLAG_CTS);
}
if (USART_GetFlagStatus(usart_dev->periph, USART_FLAG_LBD) != RESET)
{
USART_ClearFlag(usart_dev->periph, USART_FLAG_LBD);
}
if (USART_GetFlagStatus(usart_dev->periph, USART_FLAG_TC) != RESET)
{
USART_ClearFlag(usart_dev->periph, USART_FLAG_TC);
}
}
}
#ifdef BSP_USING_UART1
void USART1_IRQHandler(void)
{
rt_interrupt_enter();
usart_isr(&usart_device1);
rt_interrupt_leave();
}
#endif
#ifdef BSP_USING_UART2
void USART2_IRQHandler(void)
{
rt_interrupt_enter();
usart_isr(&usart_device2);
rt_interrupt_leave();
}
#endif
#ifdef BSP_USING_UART3
void USART3_IRQHandler(void)
{
rt_interrupt_enter();
usart_isr(&usart_device3);
rt_interrupt_leave();
}
#endif
int rt_hw_uart_init(void)
{
struct serial_configure config = RT_SERIAL_CONFIG_DEFAULT;
#ifdef BSP_USING_UART1
usart_device1.parent.ops = &usart_ops;
usart_device1.parent.config = config;
rt_hw_serial_register(&usart_device1.parent, usart_device1.name,
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_INT_TX,
RT_NULL);
#endif
#ifdef BSP_USING_UART2
usart_device2.parent.ops = &usart_ops;
usart_device2.parent.config = config;
rt_hw_serial_register(&usart_device2.parent, usart_device2.name,
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_INT_TX,
RT_NULL);
#endif
#ifdef BSP_USING_UART3
usart_device3.parent.ops = &usart_ops;
usart_device3.parent.config = config;
rt_hw_serial_register(&usart_device3.parent, usart_device3.name,
RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_INT_RX | RT_DEVICE_FLAG_INT_TX,
RT_NULL);
#endif
return RT_EOK;
}
#endif /* BSP_USING_UART */
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